11 results for Myriophyllum aquaticum (parrot feather)

Impact ID Scientific Name Impact Type Study Type Study Location Impact Description Geographic Location Reference
3425 Myriophyllum aquaticum Habitat Alteration Experimental Field Parrot feather’s dense vegetation provides mosquito larvae a refuge from predation. 32697
3428 Myriophyllum aquaticum Habitat Alteration Experimental Field "The results demonstrate a positive relationship between the abundance of immature Anopheles mosquitoes and the density of emergent stems of M. aquaticum. The consistent presence of Anopheles larvae in patches with plant densities of 500-600 stems m-2 or greater (Fig. 1) is further evidence that Myriophyllurn patches with high stem densities provide the best habitat conditions for immature Anopheles." 32698
3439 Myriophyllum aquaticum Habitat Alteration Anecdotal Field The rivers of the Cape have experienced a decreased flow, relative to earlier years, mainly due to Myriophyllum and other aquatic weed growth. 32676
3443 Myriophyllum aquaticum Habitat Alteration Anecdotal Field "The plant is also capable of increasing evapotranspiration. Water loss is doubled when the water surface is covered with M. aquaticum (H. H. Bosman, Department of Water Affairs and Forestry, Pretoria, 1996, pers. comm.)." 32668
3445 Myriophyllum aquaticum Habitat Alteration Experimental Field "Water losses due to evapotransportation in the mesocosms colonized by M. aquaticum, B. subquadripara, E. polystachya and P. lanceolata were statistically similar and promoted increases between 1.54 and 2.21 times the free surface." 32710
3449 Myriophyllum aquaticum Habitat Alteration Experimental Field "Because of their rapid growth, they can form dense canopies which occupy a large amount of space, they block sunlight and oxygen exchange and as a result outcompete native species. In full summer, the oxygen content felled to <5 mg/l in the underlying water layers of the dense canopies at some of our heavily invaded sites." 32943
3455 Myriophyllum aquaticum Habitat Alteration Experimental Field "Quadrats where native plant species were dominant were similar to or had higher DO than areas with no vegetation. The lowest DO concentrations were observed in quadrats dominated by parrot feather, and were significantly lower than was observed for all native species or open areas." 33983
7102 Myriophyllum aquaticum Habitat Alteration Anecdotal N/A Myriophyllum aquaticum can dramatically alter ecosystems by shading out algae in the water column. 32717
7103 Myriophyllum aquaticum Habitat Alteration Observational Field In Germany, the infestation of Myriophyllum aquaticum mats created shaded conditions in shallow waters, and appeared to be correlated with a decline in native macrophyte diversity. Germany 32654
7104 Myriophyllum aquaticum Habitat Alteration Anecdotal N/A Dense infestations of Myriophyllum aquaticumcan rapidly overtake small ponds and sloughs, changing their physical and chemical properties, including impeding water flow, which can result in increased flood duration and intensity. 32717
7105 Myriophyllum aquaticum Habitat Alteration Observational Field Senescence of Myriophyllum aquaticum can leave a dense mat of decomposed plant litter and sediments at the bottom of heavily-invaded sites that may create unsuitable habitat for invertebrate colonization. Belgium 38185

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